demo

demo.php

<?php

abstract class SomeAbstractClass 
{

    protected $name;

    public function getName()
    {
        return $this->name;
    }
    
}

interface SomeInterface
{

    public function getName();

}

class Demo extends SomeAbstractClass implements SomeInterface
{

    /**
     * Sets a value to a key of the class.
     * 
     * @property string $key   The key to be set.
     * @property string $value The value to set in the key.
     * @return self
     */
    public function setValue($key, $value)
    {
        $this->$key = $value;
        return $this;
    }
}


$x = new Demo();
$x->setValue('name',       'Stuardo Rodríguez');
$x->setValue('experience', 'high');
var_dump($x, $x->getName());